TPA2031D1
www. ti. com SLOS546 – MAY 2008
2. 5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
•2 Pin-to-Pin Compatibility with TPA2010D1 • 32 ms Start-up Time Eliminates CODEC
Click/Pop noise • Maximum Battery Life and Minimum Heat
– Efficiency With an 8-Ω Speaker:
– 88% at 400 mW
– 2. 8-mA Quiescent Current – 0. 5-µA Shutdown Current • Only Three External Components – Optimized PWM Output Stage Eliminates
LC Output Filter
– Improved PSRR (–75 dB) and Wide Supply Voltage (2. 5 V to 5. 5 V) Eliminates Need for a Voltage Regulator
– Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor
– Improved CMRR Eliminates Two Input Coupling Capacitors
• Wafer Chip Scale Packaging (WCSP) – NanoFree™ (YZF)
APPLICATIONS
• Ideal for Wireless or Cellular Handsets and PDAs
DESCRIPTION
The TPA2031D1 is a 2. 5-W high efficiency filter-free class-D audio power amplifier in a 1,45 mm × 1,45 mm wafer chip scale package (WCSP) that requires only three external components.
Features like 88% efficiency, –75-dB PSRR, improved RF-rectification immunity, and 8 mm2 total PCB area make the TPA2031D1 class-D amp ideal for cellular handsets. 32 ms start-up time allows the TPA2031D1 to share the same GPIO enable/shutdown control as the CODEC without passing through the CODEC turn-on pop.
In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the TPA2031D1. The TPA2031D1 allows independent gain while summing signals from separate sources, and has a low 36 µV noise floor, A-weighted.
APPLICATION CIRCUIT
+ RI
Differential Input
- RI
SHUTDOWN
Internal Oscillator
To Battery VDD
CS
IN-
_
+ IN+
PWM
HBridge
VO+ VO-
Bias Circuitry
GND TPA2031D1
9-BALL WAFER CHIP SCALE
YZF PACKAGE TPA2031D1 DIMENSIONS
(TOP VIEW OF PCB)
IN+ GND...
TPA2031D1 PDF File
